I imagine it's basic encryption math. For instance, a ten digit numeric password only has 10 to the 10th power (10,000,000,000) possible combinations.
A ten digit numeric and letter password, in contrast, has 10 to the 36th power or 1,000,000,000,000,000,000,000,000,000,000,000,000 possible combinations. And that's just English's 26 letters! Your average 4 digit pin has only 4,000,000,000 possible combinations, which isn't particularly secure. Dan ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... [email protected] Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help
